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CVE-2026-80231— native CA store conn reuse

Quick assessment

Affected
curl curl
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

curl是瑞典curl团队开源的一款用于从服务器传输数据或向服务器传输数据的工具。 curl 8.21.0及之前版本存在会话机制问题漏洞，该漏洞源于libcurl重用HTTPS连接时未考虑Native CA Store设置，即使给定主机名使用与连接创建时不同的CURLSSLOPT_NATIVE_CA设置，也会错误地复用现有连接。

AI Predicted 5.9 Difficulty: Moderate EPSS 0.94% · P59

Affected Version Matrix 60

VendorProduct Version RangeStatus
curl curl 7.71.0< 8.14.2 affected
8.15.0< 8.16.1 affected
8.17.0< 8.20.1 affected
8.21.0< 8.22.0 affected
148534db57dda611cf8516e92e4d6e35fc1e5074< 7be1e70cb6bcd83e130ecfe8cb91b6a7dcdeff42 affected
8.21.0 affected
8.20.0 affected
8.19.0 affected
… +52 more rows
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I. Basic Information for CVE-2026-80231

Vulnerability Information
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Vulnerability Title
native CA store conn reuse
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup for a given hostname even when using a different Native CA Store setting (`CURLSSLOPT_NATIVE_CA`) than when the connection was created.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
对错误会话暴露数据元素
Source: CVE Program / CVE List V5
Vulnerability Title
curl 会话机制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
curl是瑞典curl团队开源的一款用于从服务器传输数据或向服务器传输数据的工具。 curl 8.21.0及之前版本存在会话机制问题漏洞，该漏洞源于libcurl重用HTTPS连接时未考虑Native CA Store设置，即使给定主机名使用与连接创建时不同的CURLSSLOPT_NATIVE_CA设置，也会错误地复用现有连接。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
curl curl 7.71.0 ~ 8.14.2 -
curl curl 148534db57dda611cf8516e92e4d6e35fc1e5074 ~ 7be1e70cb6bcd83e130ecfe8cb91b6a7dcdeff42 -
curl curl 8.21.0 -

II. Public POCs for CVE-2026-80231

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III. Intelligence Information for CVE-2026-80231

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Vendor Advisories for CVE-2026-80231 (2)

Security Blog Posts for CVE-2026-80231 (1)

Same Patch Batch · curl · 2026-09-06 · 9 CVEs total

CVE-2026-82208 wolfSSL CA-cache hit overrides callback
CVE-2026-82209 domain-scoped PSL domain cookie
CVE-2026-18924 HTTP/2 server push UAF
CVE-2026-19931 Negotiate ambient user conn reuse
CVE-2026-80229 OpenSSL provider use-after-free
CVE-2026-80230 OpenSSL pinning bypass
CVE-2026-80255 secure cookie attribute bypass with tab
CVE-2026-13608 OpenLDAP SASL authentication bypass

IV. Related Vulnerabilities

Same product: curl
Same vendor: curl
Same weakness: CWE-488

V. Comments for CVE-2026-80231

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